Matt,
I offered the video as an example of cam phasing. There are all kinds of ways to alter the cam position relative to it's drive, which is cam phasing. You yourself claim to have seen 100. Again the issue is uniqueness. Are the means you intend to employ unique?
If you have done your due delligence on patent searches and know that your design is indeed unique, then you should pay some attention to this area as well. Mechanical design patents can be challenging, but they can pay off as well.